Image blur correction device having image blur-correcting function

Abstract

An image blur correction device that forms a strong rolling surface on a movable member having a resin part and is improved in strength of the movable member. The image blur correction device includes a fixed member, rolling balls, and the movable member that includes a sheet metal member and the resin part molded integrally with the sheet metal member, holds an image capture device, and is movable in a direction orthogonal to an optical axis of the image capture device, relative to the fixed member. Part of the movable member, where the sheet metal member is exposed from the resin part, forms the rolling surfaces on which the rolling members roll, and the sheet metal member is formed into a shape surrounding the image capture device, as viewed from the optical axis direction.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]The present invention relates to an image blur correction device having an image blur-correcting function.Description of the Related Art[0002]In recent years, there have been proposed some types of a system of an image blur correction mechanism equipped in an image capture apparatus or a lens barrel. For example, there are known a system of driving some of lenses of a photographing optical system for image blur correction and a system of driving an image capture device included in a camera body for image blur correction. Further, there is known a system in which the above-mentioned systems are combined for image blur correction, so as to drive both of the some of lenses of the photographing optical system and the image capture device.[0003]The above-mentioned image blur correction mechanism that drives the lens and / or the image capture device (hereinafter generically referred to as the optical element) generally employs a system...

AI Technical Summary

Benefits of technology

The present invention provides an image blur correction device that improves the strength of the movable member. This is achieved by forming a strong rolling surface on the movable member which has a resin part. Additionally, the invention also suppresses the occurrence of thermal stress on the adhesion interface, resulting in improved reliability.

Problems solved by technology

Particularly, in a case where the method of forming the rolling surfaces as disclosed in Japanese Laid-Open Patent Publication (Kokai) No. 2013-231923 is employed, the strength of the movable member is not considered, which may cause insufficiency of the strength.

Further, the technique disclosed in Japanese Laid-Open Patent Publication (Kokai) No. 2008-64863 focuses on the temperature of the sensor, but does not consider deformation of a component, caused due to temperature change.

For example, there is a fear that there may arise such a problem that the image plane is bent due to temperature change, making it is impossible to adjust the focus on the whole screen.

Particularly, in a case where the components are fixed with an adhesive, there is a fear that it is impossible to maintain the performances of the components due to thermal stress occurring on adhesion interface.

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